Thank you very much! Why Stata can not calculate percentile's of survival time in my dataset? Can you suggest me reference to read about that? I don't understand the reason very well.
Okay, i understood, because in my group patients survival time almost 80%, so I suppose that it is the reason that I could not see 75, 50, 25 persentiles respectively. Am I right? :)
The medians reported by *stdescribe* and *stsum* are different things, so they will not necessarily have the same value. *stdescribe* reports the median for several values associated with the data, including the median of the time at risk and the median for the exit time. These are just characteristics that describe the data, and they are not statistics intended to perform inference on the population. The median for the time at risk and for the exit times are obtained by taking the time each individual is at risk or exits the study and computing the raw median, as you would compute with *summarize, detail* On the other hand, *stsum* reports the median survival time; this is obtained from the Kaplan-Meier product-limit estimate of the survivor function, and it is an estimator of the median survival time in the population.
what estimation should i use for my parametric AFT log linear model?
Thank you so much
Okay but how do you enter in data from scratch and get into st_format?
Exactly! This video was useless
@@marcteenhc9793 There's another video from STATA called "Learn how to set up your data for survival analysis in Stata".
Thank you very much! Why Stata can not calculate percentile's of survival time in my dataset? Can you suggest me reference to read about that? I don't understand the reason very well.
Okay, i understood, because in my group patients survival time almost 80%, so I suppose that it is the reason that I could not see 75, 50, 25 persentiles respectively. Am I right? :)
Hello, it is a great guide but how can I transfer this results into a word document? Thanks for answering :)
copy and paste
Why the median time in stdescribe is different than stsum ?
The medians reported by *stdescribe* and *stsum* are different things, so they will not necessarily have the same value.
*stdescribe* reports the median for several values associated with the data, including the median of the time at risk and the median for the exit time. These are just characteristics that describe the data, and they are not statistics intended to perform inference on the population. The median for the time at risk and for the exit times are obtained by taking the time each individual is at risk or exits the study and computing the raw median, as you would compute with *summarize, detail*
On the other hand, *stsum* reports the median survival time; this is obtained from the Kaplan-Meier product-limit estimate of the survivor function, and it is an estimator of the median survival time in the population.
@@statacorp Thank you for this answer. It explains a lot. Keep up the good work!